From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756108AbYD2M5Y (ORCPT ); Tue, 29 Apr 2008 08:57:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751710AbYD2M5Q (ORCPT ); Tue, 29 Apr 2008 08:57:16 -0400 Received: from e28smtp05.in.ibm.com ([59.145.155.5]:42049 "EHLO e28smtp05.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751682AbYD2M5P (ORCPT ); Tue, 29 Apr 2008 08:57:15 -0400 Date: Tue, 29 Apr 2008 18:26:59 +0530 From: Gautham R Shenoy To: linux-kernel@vger.kernel.org, Zdenek Kabelac , Peter Zijlstra , Oleg Nesterov , Heiko Carstens , "Rafael J. Wysocki" Cc: Andrew Morton , Ingo Molnar , Srivatsa Vaddagiri Subject: [PATCH 0/8] CPU-Hotplug: Fix CPU-Hotplug <--> cpufreq locking dependency Message-ID: <20080429125659.GA23562@in.ibm.com> Reply-To: ego@in.ibm.com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello everyone, A couple of months ago Zdenek Kabelac had reported a Circular locking dependency in resume, which was related to the locking dependency between the cpufreq and CPU-Hotplug subsystems. http://lkml.org/lkml/2008/2/26/479 This patchset aggregates the various patches that have been posted in the recent past, to solve this problem. There are a few more TODO items in CPU-Hotplug , unrelated to this problem, that cropped up in the various discussions. They will be posted in a seperate thread. The patchstack has been lightly tested on a 4-way x86 machine with CPU-Hotplug running in parallel with kernbench and changing cpufreq governors simultaneously. Awaiting your feedback, gautham